add unique key for t_ds_process_definition

add unique key for t_ds_process_definition

sql/upgrade/1.3.0_schema/postgresql/dolphinscheduler_ddl.sql

@@ -364,3 +364,22 @@ select dc_dolphin_T_t_ds_error_command_D_worker_group_id();
 DROP FUNCTION dc_dolphin_T_t_ds_error_command_D_worker_group_id();
 
 
+-- uc_dolphin_T_t_ds_process_definition_A_process_definition_unique
+delimiter d//
+CREATE OR REPLACE FUNCTION uc_dolphin_T_t_ds_process_definition_A_process_definition_unique() RETURNS void AS $$
+BEGIN
+       IF NOT EXISTS (SELECT 1 FROM information_schema.STATISTICS
+          WHERE TABLE_NAME='t_ds_process_definition'
+                            AND INDEX_NAME ='process_definition_unique')
+      THEN
+         ALTER TABLE t_ds_process_definition ADD CONSTRAINT process_definition_unique UNIQUE (name,project_id);
+       END IF;
+END;
+$$ LANGUAGE plpgsql;
+d//
+
+delimiter ;
+SELECT uc_dolphin_T_t_ds_process_definition_A_process_definition_unique();
+DROP FUNCTION IF EXISTS uc_dolphin_T_t_ds_process_definition_A_process_definition_unique();
+
+